Abstract:
:B cells not only play a pivotal role in humoral immunity, but also are involved in a broad spectrum of immune responses, including antigen presentation and T-cell function regulation. The identification of cell-surface CD molecules derived from a series of Human Leukocyte Differentiation Antigens (HLDA) Workshops has been instrumental to the discovery and functional characterization of human B-cell populations. Moreover, many events regulating B-cell development, activation, and effector functions are orchestrated by these cell-surface molecules. During the Ninth HLDA Workshop (HLDA9) eighteen new CDs were allocated to cell-surface molecules expressed on B cells: CD210a (IL10RA), CD215 (IL15RA), CD270 (TNFRSF14), CD307a (FCRL1), CD307b (FCRL2), CD307c (FCRL3), CD307d (FCRL4), CD351 (FCAMR), CD352 (SLAMF6), CD353 (SLAMF8), CD354 (TREM1), CD355 (CRTAM), CD357 (TNFRSF18), CD358 (TNFRSF21), CD360 (IL21RA), CD361 (EVI2B), CD362 (SDC2), and CD363 (S1PR1). Here we present their expression patterns on leukocytes, including T lymphocytes, NK cells, granulocytes, monocytes, plasmacytoid and monocyte-derived dendritic cells, and several B-cell subsets. These new CD molecules are expressed on B cells at various stages of differentiation; from bone marrow precursor pro-B cells to plasma cells. Three of them, CD307a, CD307b and CD307d, exhibit a B-cell restricted expression pattern, whereas the rest are also present on other leukocytes. In this paper we also review the structural characteristics, expression, and function of these new CD molecules. The availability of monoclonal antibodies directed against novel B cell-surface molecules will have broad implications not only for B-cell biology, but also for the development of new diagnostic and therapeutic tools.
journal_name
Immunol Lettjournal_title
Immunology lettersauthors
Matesanz-Isabel J,Sintes J,Llinàs L,de Salort J,Lázaro A,Engel Pdoi
10.1016/j.imlet.2010.09.019subject
Has Abstractpub_date
2011-01-30 00:00:00pages
104-12issue
2eissn
0165-2478issn
1879-0542pii
S0165-2478(10)00255-5journal_volume
134pub_type
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